Effects of Bowed Blade Design on Supersonic Flow

doi:10.7652/xjtuxb201609011

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Effects of Bowed Blade Design on Supersonic Flow

更新时间：2025-07-09

- Effects of Bowed Blade Design on Supersonic Flow
- Vol. 50, Issue 9, Pages: 66-73(2016)
- 作者机构：
  
  哈尔滨工业大学能源科学与工程学院,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201609011
  CLC： TK26
- Online First：10 September 2016，
  
  Published：2016
- 稿件说明：
移动端阅览
Effects of Bowed Blade Design on Supersonic Flow[J]. 2016, 50(9): 66-73.
DOI：

Effects of Bowed Blade Design on Supersonic Flow[J]. 2016, 50(9): 66-73. DOI： 10.7652/xjtuxb201609011.

摘要

针对弯叶片可以减少激波损失且作用机理不明的问题

对工业汽轮机中跨声速、超声速流动条件下弯叶栅进行了数值研究

分析了弯叶片对流场结构的影响

并为此设计了叶片弯角分别为0°、±5°、±10°、±15°、±20°、±25°的11种正、反弯角静叶方案

弯叶片弯高为50%展向

叶根与叶顶弯角相同。研究结果表明:弯叶片改变了激波结构

这一作用在不同的超声速条件下是相同的; 在压比较大、流量较小的条件下

工业汽轮机采用超声速设计是可行的。弯叶片在超声速条件下可以降低叶栅损失

且存在最优值; 相对于亚声速流动

超声速动叶吸力面上的损失减小; 11种方案下静叶片正弯设计对动叶压力面影响较小

静叶片反弯设计对动叶压力面与吸力面均有较大影响。该结果可为工业汽轮机超声速设计、研究提供参考。

Abstract

A bowed blade under the conditions of transonic flow and supersonic flow in an industrial steam turbine is numerically investigated to reveal the mechanism of lowering shock loss for a bowed blade. Analyzing the influence of a bowed blade on a flow field structure

11 stator schemes of a straight blade and bowed blades are designed with bowed angles of 0°

±5°

±10°

±15°

±20° and ±25°. The relative bowed height of a blade is 50% span

while blade root and blade tip have the same bowed angle. The results show that a bowed blade changes the shock structure

which is the same under different supersonic flows. It is feasible to conduct supersonic flow design for an industrial steam turbine under the condition that the stage pressure is rather high while the flow is rather small. Under the condition of supersonic flow

a bowed blade enables to decrease energy loss and there exists an optimum value. The energy loss on the supersonic rotor decreases compared with that on subsonic rotor. In the 11 schemes

positively bowed stators exert slight effects on the pressure side of the rotor

while the negatively bowed stators exert obvious effects on both the pressure and suction sides of the rotor.

关键词

Keywords

references

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